Hi, I've read on the message timestamp(KIP-32) that for time-rolling deletes use LogAppendTime, but this only applies to delete policy.
What timestamp is used when the cleanup policy is _both_ compact+delete? It would be very useful if it was the timestamp from the record metadata rather than LogAppendTime or CreateTime as it would of course allow kafka-backed state stores to simply use the underlying compaction to evict records based on custom application timestamps and thus have rich ttl behaviour, that could survive even a full replay of the input stream, etc. Best, Michal
